Discussion Draft of the Fourth Edition of the International Code of Zoological Nomenclature. Loof, P. A. A. & Heyns, J.: Case 2927: Nygolaimus Cobb, 1913 (Nematoda): proposed designation of Dorylaimus brachyuris de Man, 1880 as the type species. Sidorenko, V. S.: Case 2937: Cacoxenus indagator Loew, 1858 (Insecta, Diptera): proposed conservation of the generic and specific names. Groves, C. P.: Case 2998: Australopithecus afarensis Johanson, 1978 (Mammalia, Primates): proposed conservation of the specific name. Gentry, A., Clutton-Brock, J. & Goves, C. P.: Case 3010: Proposed conservation of usage of 15 mammal specific names based on wild species which are antedated by or contemporary with those based on domestic animals [Equus africanus, Equs ferus, Camelus ferus, Lama guanicoe, Vicugna vicugna, Bos primigenius, Bos gaurus, Bubalus arnee, Bos mutus, Capra aegagrus, Ovis orientalis, Cavia aperea, Canis lupus, Mustela putorius, Felis sylvestris]. Rosenberg, G.: Case 2962: D.L.G. Karsten (1789), Museum Leskeanum, vol. 1 (Regnum Animale): proposed suppression for nomenclatural purposes. Kadolsky, D.: Comments on the proposed conservation of the specific name Xerophila geyeri Soós, 1926 (Mollusca, Gastropoda) (Case 2870; see BZN 51: 105-107, 336-338; 52: 176-178, 331-333). Nixon, M.: Comment on the proposed conservation of the specific names of Octopus vulgaris Cuvier, [1797] an Loligo vulgaris Lamarck, 1798 (Mollusca, Cephalopoda) (Case 2922; see BZN 52: 24-26, 333-335). Davis, C. C.: Comment on the proposed conservation of Monstrilla Dana, 1849 and Thaumaleus Kroyer, 1849 (Crustacea, Copepoda) (Case 2894; see BZN 52: 245-249). Booth, R. G.: Comment on the proposal to remove the homonymy between Brachypterinae Erichson, [1845] (Insecta, Coleoptera) and Brachypterinae Zwick, 1973 (Insecta, Plecoptera), and proposed precedence of Kateretidae Ganglbauer, 1899 over Brachypterinae Erichson, [1845] (Case 2865; see BZN 51: 309-311; 52: 179-181, 335-336). Smith, H. M., Wake, D. B. & Jennings, M. R.: Comments on the proposed conservation of Hydromantes Gistel, 1848 (Amphibia, Caudata) by the designation of Salamamdra genei Temminck & Schlegel, 1838 as the type species (Case 2868: see BZN 50: 219-223; 5: 149-153; 52: 183-186, 339-342). Smith, H. M. & Wake, D. B.: Comments on the proposed conservation of Hemidactyliini Hallowell, 1856 (Amphibia, Caudata) (Case 2869; see BZN 50: 129-132; 51: 153-156, 264-265, 341-342; 52: 337-338). Opinion 1822: Helix nitidula Draparnaud, 1805 and H. nitens Michaud, 1831 (currently Aegopinella nitidula and A. nitens; Mollusca, Gastropoda): specific names conserved, and a neotype designated for H. nitidula. Opinion 1823: Nesopupa Pilsbry, 1900 (Mollusca, Gastropoda): conserved. Opinion 1824: Ischyrus Lacordaire, 1842, Lybas Lacordaire, 1842, Mycotretus Lacordaire, 1842 and Megischyrus Crotch, 1873 (Insecta, Coleoptera): conserved. Opinion 1825: Poecilonota Eschscholtz, 1829, Palmar Schaefer, 1949 and Scintillatrix Obenberger, 1956 (Insecta, Coleoptera): conserved by the designation of Buprestis variolosa Paykull, [1799] as the type species of Scintillatrix. Opinion 1826: Melanophila Eschscholtz, 1829 und Phaenops Dejean, 1833 (Insecta, Coleoptera): conserved by the designation of Buprestis acuminata De Geer, 1774 as the type species of Melanophila. Opinion 1827: Hydrophoria Robineau-Desvoidy, 1830 (Insecta, Diptera): Musca lancifer Harris, [1780] designated as the type species, and a neotype designated for M. lancifer. Case 1828: Apis terrestris Linnaeus, 1758, A. muscorum Linnaeus, 1758 and A. lucorum Linnaeus, 1761 (currently Bombus terrestris, B. muscorum and B. lucorum) and Bombus humilis Illiger, 1806 (Insecta, Hymenoptera): specific names conserved, and neotypes designated for B. terrestris and B. muscorum. Opinion 1829: Magalodontidae Konow, 1897 (Insecta, Hymenoptera): spelling emended to Mealodontesidae, so removing the homonymy with Megalodontidae Morris & Lycett, 1853 (Mollusca, Bivalvia). Opinion 1830: Caeciliidae Kolbe, 1880 (Insecta, Psocoptera): spelling emended to Caeciliusidae, so removing the homonymy with Caeciliidae Rafinesque, 1814 (Amphibia, Gymnophiona). Opinion 1831: Plesiosaurus rugosus Owen, 1840 (currently Eretmosaurus rugosus; Reptilia, Plesiosauria): neotype designated. Opinion 1832: Coluber poecilogyrus Wied-Neuwied, [1824] (currently Liophis poecilogyrus) (Reptilia, Serpentes): specific name conserved. Opinion 1833: Psittacus banksii Latham, 1790 and P. lathami Temminck, 1807 (currently Calyptorhynchus banksii and C. lathami; Aves, Psittaciformes): specific names conserved.